<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>Other Page</title>
</head>

<body>
  <h1 id="banner">This is the nested document</h1>

  <script type="text/javascript">
    function displayMessage(msg) {
      document.getElementById('banner').innerHTML = msg;
    }
  </script>
</body>

</html>
